Converting between square units requires unnatural syntax

This should work:

14:45 <marcog> convert 10 square feet to square meters
14:45 <tibid> I can't do that: Error in '10 square feet': Parse error

But this is the only way to do it:

14:45 <marcog> convert 10 feet^2 to meters^2
14:45 <tibid> 10 feet^2 = 0.9290304 meters^2

It's debatable whether or not this should be fudged to work:

14:46 <marcog> convert 10 feet^2 to meters
14:46 <tibid> I don't think 10 feet^2 can be converted to meters